Fully monolithically integrated feedback voltage controlled oscillator

A fully monolithically integrated voltage controlled oscillator (VCO) using feedback technique is presented here, The circuit provides oscillation wit hin the frequency range of 6.3-7.0 GHz. The corresponding tunable relative bandwidth is 10%. The feedback topology proves to provide a good linearity of the oscillation frequency-dependence versus tuning voltage. The maximal deviation of the frequency behavior from its linear fit is Delta f = 39 MHz , It is shown in following that the feedback technique can be used for broa dband VCO design.